The title complexes, (C3H12N2)[WS4] and (C6H18N2)[WS4], contain tetrahedral [WS4](2-) dianions, which accept a complex series of hydrogen bonds from the organic dications. The strength and number of these hydrogen bonds ...

The regioselective syntheses of N sup(1) and N sup(2) substituted triazoles through a 1,6-addition reaction of 1,2,3-NH triazoles to p-quinone methide were achieved under mild reaction conditions. The present reactions ...

Marine sponges of the order Verongida and related organisms are the richest source of bioactive bromotyrosine alkaloids. Purpurealidin K (1) along with purealidin Q (2), aerophobin 2 (3) and aplysamine 2 (4) were isolated ...

Two 4-hydroxy-5-methylcoumarin derivatives have been isolated from the roots of Diospyros kaki Thunb and D. kaki Thunb var. sylvestris Makino. One was shown to be identical to gerberinol, previously isolated from the ...

The ab initio calculation of the title compound was carried out at HF as well as DFT level of theory. The full geometry optimization of the ligand was carried out using 6-31G(d) basis set. The results obtained were correlated ...

An account of synthetic methods developed for indolocarbazole alkaloids arcyriaflavin A and staurosporinone is presented. Based on a common pathway or key intermediate involved, all these methods are broadly grouped into ...

Acylation of 2-naphthol (2), 1-naphthol(6) and resorcinol (11) with salicylic acid (1) in the presence of PPA affords salicylate esters (4,7,13 and 14), 1,2-benzoxanthone (5), 3,4-benzoxanthone(8), 3-hydroxyxanthone(12), ...

Synthesis and modification of cost-effective sorbents for removing heavy metals from water resources is an area of significance. It had been reported that materials with biological origins, such as agricultural and animal ...

The increasingly stringent emission regulations for particulate matter (PM) reduction mandate the inclusion of contemporary strategies to mitigate this solid-phase pollutant. These PM having diameter of 2.5 Mu m or less ...